Luimoto (luimoto.com) is working on some custom seats for the Speedy project. They currently do not offer Triumph Speed Triple seats (but probably will after doing mine since they have mine to modle off of)

Here are a couple of renderings. Which option do you like best? (I think the gold color is actually tan, just looks gold in the renderings, you can go to Luimotos site and see some of their other work to get an idea. I have one of their seats on my R1 and love it)

I think I will go toward option one. I am waiting on a swatch of the green material to decide what to do with the rear seat.

The intent of the rear seat being green is to make it blend and look like a solo seat. If the green material does not match REALLY well then I wll probably go with the Carbon fiber material on both seats with the green/gold stripe. (not sure if you can see it on your monitor but the gold center stripe is surrounded by thin green stripes)

But it's not as easy as that. A few months ago, I saw a three-wheeled scooter thing with two wheels in the front (I know, technically not a motorcycle). Then, there's side cars, and those three-wheeled things with the VW engines...